I won't put $100k against this, but I'll put $10k against it, because "the truth" is worth it. I'll pool $10k into a $100k stake behind a debate team that can debate this (and validate that this is actually refutable). This is valid until 2021-03-01.
"Looking for an unambiguous calendar-and-clock format that is internationally understood? It’s time for ISO 8601."
"ISO 8601 tackles this uncertainty by setting out an internationally agreed way to represent dates:
YYYY-MM-DD
For example, September 27, 2012 is represented as 2012-09-27."